BUF22821
- 24-CHANNEL GAMMA
- 22-CHANNEL PROGRAMMABLE
- 2-CHANNEL STATIC GAMMA
- 2-CHANNEL PROGRAMMABLE VCOM
- 10-BIT RESOLUTION
- 16x REWRITABLE NONVOLATILE MEMORY
- TWO INDEPENDENT MEMORY BANKS
- RAIL-TO-RAIL OUTPUT
- LOW SUPPLY CURRENT: 0.5mA/channel
- SUPPLY VOLTAGE: 9V to 20V
- DIGITAL SUPPLY: 2V to 5.5V
- I2C™ INTERFACE
- APPLICATIONS
- TFT-LCD REFERENCE DRIVERS
PowerPAD is a trademark of Texas Instruments.
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.
The BUF22821 offers 22 programmable gamma channels, two programmable VCOM channels, and two static gamma channels. It is ideal for the new 10-bit source drivers that require 22 gamma channels.
The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF22821 supports up to 16 write operations to the on-chip memory. The BUF22821 has two separate banks of memory, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves.
All gamma and VCOM channels offer a rail-to-rail output that typically swings to within 100mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz.
The BUF22821 is manufactured using Texas Instruments' proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and high supply voltage operation of up to 20V. The BUF22821 is offered in a HTSSOP-38 PowerPAD™ package. It is specified from -40°C to +85°C.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | Programmable Gamma-Voltage Generator and Vcom Calibrator with Two-Bank Memory datasheet (Rev. D) | 2011年 7月 12日 | |
| EVM User's guide | BUF22821EVM-USB Users Guide (Rev. A) | 2016年 5月 31日 | ||
| Application note | Driving Capacitive Loads with Gamma Buffers | 2012年 11月 20日 | ||
| More literature | BUF22821EVM Thank You Letter | 2007年 12月 21日 | ||
| EVM User's guide | BUF22821EVM Evaluation Board User's Guide / Software Tutorial | 2007年 9月 11日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
BUF22821EVM-USB — BUF22821 評估板
The BUF22821EVM-USB is a platform for evaluating the performance of the BUF22821 gamma-voltage generator under various signal, reference and supply conditions.
This device offers 22 programmable gamma channels, each with 10 bit resolution.
SBOC417 — BUF22821EVM-USB User Software
支援產品和硬體
產品
LCD 及 OLED 顯示器電源和驅動器
硬體開發
開發板
SBOC418 — BUF22821EVM-USB Source Code
支援產品和硬體
產品
LCD 及 OLED 顯示器電源和驅動器
硬體開發
開發板
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (DCP) | 38 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點